Type-writing machine.



L. C.. MYERS.

TYPE WRITING MACHINE. APPLICATION FILED JUNE 14, 1909.

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uuml-Wi Arrofmfr I1. C. MYERS. TYPE WRITING MACHINE. APPLIOATION FILED JUNE 14, 1909.

Patented Apr. 21, 1914.

3 SHEETS-SHEET 2.

L. ,0. MYERS. TYPE WRITING MACHINE. APPLIOATION FILED JUNE14, 1909.

1,094,1 62. Patented A111121, 1914 3 SHEETS-SHEET 3.

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ATTORNEY tail edge view of one of the escapement D sTATeisiaNTEnT onirica- LEWIS C. MYERS, OF BROOKLYN, YORK, ASSIGNOR, BY-MESNE ASSIGNMENTS, T0 ,ROYAL TYPEWRITER COMPANY, INC., 0F NEW YORK, N. Y., A CORPORATION OF NEW l YORK..

t Yorinhave invented certain Improvements in TypeWriting Machines, of which the f .following is a specification.

\ rlhis invention relates particularly to escapement 'devices of a typewritingmachine.

in the accompanying drawings: Figure 1 is a detail elevation partly in section lof the escapement devices and means for operating them; Fig. 2, Aa detached sectional view showin@ thevescape wheel shaft and the escape w eel secured thereto; Fig. 3, a dedogs; Figf, a detail side elevation of the toothed s mesh with the carriage rack and atoothed Wheel to be connected by drive pawls withY the escape wheel; Figr 5, an elevation looking at the left hand endof Fig. 4; Fig. 6, a de-V tail view showing the adjustable back check cooperating with the escape wheel; Figi, a side elevation of Fig. 6; Fig. 8, a'detail view showing the loose escapement pawlv with a rounded working .face as having 'been set forwardin position to give drop Fig. 9, a similar View showing in iull lines the positionof theparts when the loose pawl f moved by thestress of the escape wheel has been arrested by its limiting stop; 10, a Afront view of the escape devices;y Fig. 11,

showing the esca-pement rocker as it 4may be operated in the Royal Standard machine; Fig. 13, a perspective View illustrating the space bar and it's escapement actuating def Q vices; Figs. 14 and 15 are detail views illusards formed with concentric circular hubs,-

2 and 3. The one 3 is threaded to receivea screw plug 4, the front or inner face of which is formed with a cup-shaped ball race 5. The rear face of the hub 2 of the other standard is Arecessed to Iform a cup-shaped ball race 6. Anescape wheel 7 is secured` ,'to the l/shaft bym strew thread 8 adjacent eeve turning'on the escape wheelA shaft and having a gear adapted to inter-y a rear View thereof; Fig. 12, a detail view' TYPE-WRITING MAoHrNE.

` Specification of Letters Patent. Patted pl'a 21, 1914, Application led June 14, 1909. Seria-1 No. 501,902.

the rear end of the shaft; and on the ends ot the shaft are taperedfheads 10` and 1l., forming -the'opposite parts of the respective ball races. In both races, 9 "indicates the bearing balls. The head 11 has va tapered bore and is driven on to the tapered end 12 of the escape wheel shaft 12. The ball bearings are adjusted or set upfby the screw upon the end of the shaft 12, screwed there -on,. or secured by a key-way; or, he integrally formedwith the shaft 12, the lat# Between the escape wheel 7 and bearing head I ter being the preferred construction.

The other or front end of thevslccve 13 is formed with a gear or ratchet 1G that engages the feed rack 17 of the machine.

The eseapement rocker 18 is'of a construction usual or well known. As shown in this drawing, the -rigid dog is composed of a lroller 19, the axis of which is disposed in a direction approximately radial tothe axis of the escape wheel and the teeth of the plug 4. The tapered head1() niay be driven wheel Contact with the periphery of the roll..

The loose dog 20 has a working surface that is roundedin the direction of the lengths of the dog as indicated at 21 in Figs. 8 and 9. The purpose of this rounding of the dog is to aii'ord a minimum area of contact between its rounded surface and the teeth of the escape wheel and to facilitate the disengagement of the dog from the teeth. The ordinary back check stop 22 acting on the escape Wheel is shown in Figs, 6 and 7. .lt

is mounted upon a plate 23 rigid with the main frame or formin"y part of the shifting carriage frame and may'fbe adjusted by an eccentric bolt 24; to the threaded end of which a lock nut 25 is applied.

Theescapement rocker carrying the fast .and loose dogs 19 and 2O may be actuated 'ltoyiilStandard push pin end of the rocker plate that extends below its pivots 30. Such arrangement of the universal bar is similar to that machines.

Fig. 1, shows a key lever construction inwhich.3l indicates one of` the key levers adapted to act upon the universal Ybar 32 that is carried in the arms 33 rockin about an axis 34. vThere may be three suc arms' 33 one at each side of the machine and a central or intermediate one. y Adjustably mounted on the central one of these arms is an upright'35` forked at its upper end, one.

ofthe ends 36 being adapted to contact with a pin 37 in the side of an escapement acf- 3 tuating rod 4Q and the other of which car- -pivoted dogof the escapement. The rear end of plate 42 has a right angle lug 47 tap/pcd to receive a screw bolt 48 whose front end bears'against escapement rocker. This is to aid in the accurate adjustment of plate 42 in the rocker.

' Fig. 13 shows the spacing devices. There is the usual space bar 45 located at Vthe front of the key-board and from' it extend rearwardly side arm-s or bars 4G, 46, having in their rear ends concentric pivot bearings 47, 47, adapted to receive a transverse bearing rod which may be the same rod 48 as that upon which the key levers 31 are pivoted. yIn front ofr the bearing 48, the side arms 46 of the base bar are connected by a transverse rod 49 seated in. slots in the under edges of the arms 46 and held up by clips 50 having slots embracing the flattened ends of the rod'49 and secured by nuts 52 applied to the threaded ends of the rod. Instead of flattening the ends of the rods 49 and forming slots 51 in the. clips, the latter may have circular apertures as in Fig. 17 and the ends of the rod be circular. At or about the central part of the transverse rod 49 is adjustably secured an upright 53 adapted to engage the pin 37 on the side \of the escapement actuating rod when the space bar is depressed.

The carriage shift devices indicated in Fig. 16 are familiar or will be readily understood by those skilled in thisfart and specific reference thereto seems unnecessary.

One o'f the purposes of adjusting the. escapement wheelback check 22 is to permit the escape wheel to take different positions according to the desired drop from the limber to the rigid dog. The rounding ot' employed in the rounding the working face of the limbcr dog, however, it always presents a rounded ,face to the teeth of the escape w'hecl whatever may be the adjustment with respect to dro and whatever such adjustment may be t ie round surface of the dog is engaged by the HatI faces of the teeth of the escape wheel and not by.the corner or edge there` of. The drawings show a special form of under eut teeth designed toail'ord clearance where an extreme drop is employed and also on the forward motion of the escapement dog.

I claim:

l. Typewritingmachine escapement mechanism comprising a toothed escape wheel and a cooperatingl loose dog movable transversely to the plane of the wheel in and out between its teeth and 4having its working face rounded in the direction of its length and of the length of the teeth.

2. Typewriting machine mechanism comprising an escape wheel shaft, an .escape wheel fast thereon, a sleeve turning loosely on the shaft and having two ratchet wheels, a feed rack with which one of the wheels engages, a locking pawl connecting the other ratchet and the escape wheel for rotationl together in one direction only, ball bearings applied to the ends of the shaft respectively outside o'f the escape wheel and the ratchet engaging the feed rack.

3. Typewriting,r machine escapement mechanism comprising an escape wheel shaft and an escape wheel fast thereon, :i ratchet, means for connecting the ratchet and escape wheel for rotation together' in one direction only; a second ratchet rotating in either direction with the first one, a feed rack with which the latter ratchet wheel engages, ball races at the respective ends of the shaft composed ol` stationary parts and conical plugs applied to the ends of the escape wheel s a t 4. Typewriting machine escapementmechanisrn comprising an escape wheel shaft having a tapered end and a head driven thereon and adapted to form one member ot a ball racc, and a head onthe other end of the shaft adapted to form one member of another ball race.

5. Typewriting machine cscapementmechanism comprisingr standards' in one of which is fitted an adjustable screw plug, the inner end of which forms one'mernber of a 4ball race and in the other of which 'is formed one member of another ball race, an escape wheel shaft having at its' respective ends heads constituting the other members of the respective ball races, and located between said heads, an escapewheel fast on the shaft, a sleeve having two'ratchets with one of which the escape Wheel is locked for rotation in one direction only and the other of which engages the feed rack of the machine.

6. Typewriting machine escapement mechanisin comprising an escape wheel shaft, an escape wheel fast thereon, fast and loose escapement dogs coperating with the wheel and an adjustable back stop pivoted upon an adjustable eccentric bolt.

7. Typewriting machine escapement mechanism comprising aspace bar, side arms thereof rocking about an axis at their rear ends, a transverse shaft seated in jaws in the side arms in front of their pivot, clips connecting the side arms and transverse shaft and clamp nut-s for rigidly uniting them, and an arm extending from the transverseshaft and adapted to operate the escapeinent devices of the machine.

8. Escapement mechanism for a writing machine, comprising an escapement rocker, a plate adjustably clamped in the lower end thereof, an operating rod pivoted to the plate and a gage screw turning in the rear end of the plate and bearing against the rocker.

9. Escapement mechanism comprising an escape wheel shaft tapered at one end, having an integral head at the other end and ascrew head contiguous the head, an escape Wheel screwed upon said thread, and a separately formed apertured head itting 'the taperedend of the shaft and secured thereon by pressure.

n testimony whereof, I have hereunto subscribed my name.

' LEWIS C. MYERS. Witnesses:

'-E. Hinss,

ANDREW J. SHERIDAN. 

